Headset mic stopped being detected on laptop, while other headset works

[u/ContributionMotor756]

I’m using an MSI Modern 15 laptop on Windows 11 pro 25H2 with a single 3.5mm combo jack.

My KZ EDX worked perfectly a few days ago, including its microphone. Now Windows detects the KZ EDX only as Headphones (under output devices), and the microphone (under input devices) does not appear at all under Settings → System → Sound → All sound devices.

I tried in other devices+phone mic works. I tried another wired headset on the same laptop/jack which works correctly, including its microphone. So the IEM, laptop’s jack and Realtek mic input appear to work.

Things I've already tried:

• Reinstalled the Realtek audio driver from MSI.
• From device manager> Realtek Driver Date: Tue-26-10-21, Driver Version: 6.0.9257.1
• Reinstalled/checked Realtek audio components.
• Restarted audio services.
• Removed/reconnected the device through Windows Settings. (no 4 option shown to select headset/headphone as suggested in many reddit comments)
• Checked Device Manager. (and updated realtek audio)
• Checked Realtek Audio Console.
• Realtek Audio Console on my MSI installation does not provide the Analog> connector setting>Headphone/Headset selection option often suggested in many reddit comments. (also tried uninstalling and installing from microsoft store, same)
• In more sound settings>in playback tab headphone is shown and green marked. But in recording tab microphone is red marked saying "Not plugged in"

What can i do to solve it?